Physical and mechanical properties of highly textured polycrystalline Nb4AlC3 ceramic
| Autor: | Chunfeng Hu, Yoshio Sakka, Toshiyuki Nishimura, Shuqi Guo, Salvatore Grasso and Hidehiko Tanaka |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: | |
| Zdroj: | Science and Technology of Advanced Materials, Vol 12, Iss 4, p 044603 (2011) |
| Druh dokumentu: | article |
| ISSN: | 1468-6996 1878-5514 |
| Popis: | Highly textured polycrystalline Nb4AlC3 ceramic was fabricated by slip casting in a strong magnetic field followed by spark plasma sintering. Its Lotgering orientation factor was determined on the textured top and side surfaces as f(00l) ~1.0 and f(hk0)=0.36, respectively. This ceramic showed layered microstructure at the scales ranging from nanometers to millimeters. The as-prepared ceramic had excellent anisotropic physical properties. Along the c-axis direction, it showed higher hardness, bending strength, and fracture toughness of 7.0 GPa, 881 MPa and 14.1 MPa m1/2, respectively, whereas higher values of electrical conductivity (0.81×106 Ω−1 m−1), thermal conductivity (21.20 W m−1 K−1) and Young's modulus (365 GPa) were obtained along the a- or b-axis direction. |
| Databáze: | Directory of Open Access Journals |
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